remove background in javascript code example

Example: js remove background image

if (pansel.val() == "1") 
     $("#myDiv").css('background-image', 'url(/private_images/guida_check_category.jpg)'); 
else {
     $("#myDiv").css({ 'background-color': '#ffffff' });
     $("#myDiv").css('background-image', 'none');
}
/*By Matar jaiskel*/